The anime is set to premiere on 7 January 2026.
“The Case Book of Arne” revealed new updates, which includes additional voice actors joining the cast. The anime is set to premiere next year on 7 January.
“The Case Book of Arne” cast update and other information
The new cast members are:
- Yuuki Sakakihara as Zisye
- Yuuki Shin as Nachzehrer
- Youko Hikasa as Amy
Previously announced main cast members are:
- Yuka Nukui as Lynn Reinweiß
- Kouki Uchiyama as Arne Neuntöte
- Mariya Ise as Louis Hartmann
Keisuke Inoue is directing the anime at production studio SILVER LINK. Akiko Sato handles character design and is the chief animation director, while Yoshimasa Fujisawa is handling music.
The rest of the staff members are:
- Script: Aya Matsui, Akira Nishikubo, Hitomi Ogawa
- Sub-character design: Yuri Miyoshi
- Art director, Background art: Tetsuhiro Shimizu
- Color design: Natsumi Hirama
- Prop design: Shouko Naoki
- 3D director: Yuki Kuribayashi
- 2DCG: Yuuko Shintani
- Director of photography: Sayumi Yamada
- Editing: Katsuhiro Kimura
- Sound director: Kouhei Yoshida
- Sound effects: Takuya Hasegawa
The anime adapts the 2017 mystery-adventure RPG “The Case Book of Arne”, which was initially released as a freeware in Vaka Game Magazine. The game is also available on Steam in English, Japanese, and Chinese.
The game received a shoujo manga adaptation with illustrations by Soraho Ina from November 2018 to March 2022. It was published through Media Factory’s “Monthly comic Gene”, and was collected into four tankobon volumes.
The official Steam page of the game describes the story as:
Arne Neuntöte is a vampire detective who manipulates supernatural powers. Lynn Reinweiß is a nobleman’s daughter who loves vampires. Their worlds should never have crossed, but they join hands to solve a bloody mystery.
In the darkest of nights, Lynn finds herself in desperate need of help. Then she wanders into the mysterious city of "Lügenberg", where non-humans live. Lynn's world changes drastically when she encounters "Arne", a vampire who is called "the worst" in the city.
And tonight, a new "murder case" has occurred. What is the truth behind the bizarre incidents that take place in a world where humanity and the bizarre intersect?